Dear D
I think you are introducing more confusion than enlightenment in your
email. Much as I would like to, regrettably I don't have time this
evening to try and straighten the matter out and I don't have time to
research it further.
For example. By the term 'lock' what do you mean? Do you mean the
holding of the assembled parts into a functional unit, which is what the
spring roll pins do, or lock in the sense of retaining the coupling to
the ball, which is what the sping loaded (biased) wedge does in
combination with the safety clip or equivalent? Etc etc.
Sorry for sounding narked but this is what happens when the weather is
crap and one has not had a decent fix of gliding in the last two months!
Roger Druce
On 14/01/2011 3:43 PM, DMcD wrote:
DG also mentioned that new couplings are not of the same standard as the
original ones.
There are some notes from DG about L'Hotellier couplings (01/89 and
Nov 30th 1992), which refer to the using spring pins and then the
certification of sleeves to lock the coupling instead of the spring
pins.
I'm not old enough to know, but it would appear that in about 1/86,
the spring pins appeared and perhaps spring pins were not used on
L'Hotelliers before then.
The note about sleeves is from 1992 and appears to allow sleeves
instead of the pins but also says "the sleeves should be replaced
every two years to provide adequate clamping force."
It may be the DG are referring to these different types.
D
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